1989
DOI: 10.1103/physrevb.39.6205
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Current bistability in double-barrier resonant-tunneling devices

Abstract: We show that the bistability effect observed in the current-voltage characteristics of a doublebarrier resonant-tunneling device can be removed by connecting a suitable capacitor across the device. These measurements cast serious doubt on the recent interpretation of the bistability as an intrinsic space-charge effect.Recently, Goldman et al. ' reported the observation of bistability in the current-voltage characteristics I(V) of double-barrier resonant-tunneling semiconductor heterostructures. This bistabilit… Show more

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Cited by 57 publications
(20 citation statements)
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“…Although these experimental results were first questioned in Refs. [110,111], intrinsic bistability in the current through resonant tunneling diodes was unambiguosly confirmed in subsequent experiments [112,113,114]. On the theory side, many papers have been devoted to the study of current bistability in resonant tunneling diodes [75,77,115,116,117,118,119,120].…”
Section: Beyond the Single Electron Picture: Charge Accumulation Effementioning
confidence: 95%
“…Although these experimental results were first questioned in Refs. [110,111], intrinsic bistability in the current through resonant tunneling diodes was unambiguosly confirmed in subsequent experiments [112,113,114]. On the theory side, many papers have been devoted to the study of current bistability in resonant tunneling diodes [75,77,115,116,117,118,119,120].…”
Section: Beyond the Single Electron Picture: Charge Accumulation Effementioning
confidence: 95%
“…There are three features in the current-voltage I-V curves of double-barrier devices in experiments: ͑i͒ a negative differential resistance has been found in all double barrier structures; ͑ii͒ a hysteretic plateaulike structure of current is found after the bias passes the resonant value in some experiments; 1,2 ͑iii͒ three types of current bistabilities have been found, i.e., single bistability occurring before the current resonant peak, 3-6 single bistability after the current resonant peak, [7][8][9] and the double bistabilities and hystereses. [10][11][12] To explain the bistability and hysteresis phenomena, there are various theoretical models.…”
mentioning
confidence: 97%
“…1(a) and comprise n þ 1 thiophene rings (n ¼ 0, 1, 2, 4) connected via thiol-terminated alkane chains to gold electrodes. Since the frontier orbitals of the alkyl groups are far from the Fermi energy of the contacts, while the frontier orbitals of the -conjugated units are closer to the Fermi energy, these molecules may be thought of as molecular analogues of tunnel-barrier indentations [14,15], with larger barriers formed from the alkane chains and a barrier indentation formed from the thiophene chain. Although one cannot rule out alternative explanations based on incoherent hopping, in what follows, we present a theoretical investigation of electron transport through these molecules, using the first principles nonequilibrium Green's function (SMEAGOL) method [16,17].…”
mentioning
confidence: 99%